/*
 * Copyright 1999-2011 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.druid.sql.visitor;

import com.alibaba.druid.sql.ast.expr.SQLCharExpr;
import com.alibaba.druid.sql.ast.expr.SQLIntegerExpr;
import com.alibaba.druid.sql.ast.expr.SQLNumberExpr;

public class SQLASTOutputVisitorUtils {

    public static boolean visit(PrintableVisitor visitor, SQLIntegerExpr x) {
        visitor.print(x.getNumber().toString());
        return false;
    }
    
    public static boolean visit(PrintableVisitor visitor, SQLNumberExpr x) {
        visitor.print(x.getNumber().toString());
        return false;
    }
    
    public static boolean visit(PrintableVisitor visitor, SQLCharExpr x) {
        visitor.print('\'');

        String text = x.getText();
        text = text.replaceAll("'", "''");
        text = text.replaceAll("\\\\", "\\\\");

        visitor.print(text);

        visitor.print('\'');
        return false;
    }
}
